Means for cleansing or filtering lubricating oils



May 19, 1931. F. R. slMMs ET Al.

UBRICMINGl OILS MEANS FOR CLEANSING OR FILTERING L Filed Dec. 28, 192'?v Mali l Patented May 19, 1931 UNITED STATES PATENT eprice FBEDEBICK RICHARD SIMS, F LONDON, AND BEBTBAM CHARLES JOY, 0F WEST EAHIPSTEAL'D, LONDON, ENG-LAND :mms ron cLnANsINe on. summe LUBRICATING oILs- .Application filed December 28, 1927, Serial No. 243,153, and in Great Britain November 14, 1927.v

Our invention relates to means for cleansing orfiiltering lubricating oils which involves theuse of magnets for attracting particlesof iron or steel present in lubricatingpils and s has for its object to provide improved means whereby the attracted particles canV be collected, retained and subsequently removed from the magnet.

To this end, according to the invention,`

m the pole or poles of a magnet used for attracting theparticles of iron or steel, when 1mmersed in the lubricating oil is or are each surrounded by a device (which for convenience of reference we term a cage) having openings or spaces therein to allow the passage of the said particles to the side of the pole or poles in a direction at or about right angles thereto or to the axis thereof, which openings or spaces serve to retain or hold the attracted Q particles so that they cannot be removed by the movement of the oil.

In a suitable way of carrying out the invention, the cage is formed from a stri of wire gauze oi suitable dimensions, ro ed upon itself and secured by soldering or the like toa form a sleeve of a size to fit over a magnet pole or poles. The coil or sleeve is preferably provided with a ring or rim of metal at each end for strengthening and manipulative purposes. n

When the magnet and the sleeve or cage are immersed in oil, the particles of iron or steel attracted by the magnet will become enmeshed in the gauze sleeve and retained thereby, the movement of the oil assisting the enmeshing of the particles rather than removing them, and the said sleeve can then be easily removed from the magnet for cleaning purposes when the latter is removed from the oil. The sleeve is usually of non-magnetic material but it may be of magnetic material.-

'Ina modiiication for use particularly in` cases in which the' worn or broken-0H pieces may be comparatively large as in gear-boxes, a coiled spring may be wound round the magnet to form the cage or a helical spring of at, round, rectangular or other section may be employed in place of the wire gauze sleeve. l

When the device is fitted to a magnet of horse-shoe form, the sleeve or cage ma be rectangular nd embraces both poles o th magnet. In lorder that the invention may be full understood we will now describe it by re 56 erence to the accompanying drawings, yin,

- igures 1 and 2 are, respectively, an elevation and a plan view of a bar magnet having applied thereto a device constructed accordno ing to the invention for retaining and col lecting the ferrous particles. I

Figure 3 is a section on the line 33,

Fi e 1. Y f

igures 4 and 5 are, respectively, similar e5 views to Figures l-and 2,-but showing the device applied to lboth poles of a horse-shoe magnet.

figures and 7 are, respectively, a Asectional elevation and a4 plan view of a modified. 7o form ofretaining device.v l

Fig 8 and 9 show sectional elevations of further modiiications.

Fig. 10 is a plan view of Fig. 9. Regen" to Figures 1 to 5, ais the magnet 75 and. the s eeve or cape, which is ap lied to the end thereof and which consists yo a strip of wire gauze rolled upon itself and secured by soldering or the like to form a coil, circu' lar in Figures 1 to 3 and rectangular in Fig- 80 ures 4 and 5. b1, b1 are the ri s of metal provided at each end of the coil b or strengthening and manipulative purposes and b is a stop slidable on theJ magnet a to determine the position of the sleeve b thereon.

When the magnet and the sleeve or cage are immersed in the lubricating oil, the particles of iron or steel attracted by the magnet a will become enmeshed in the gauze sleeve1 b and be retained thereby and the said sleeve can then 90 easilybe removed from the magnet a for cleaning purposes when the latter is removed from the oil. i When the sleeve b is tted over the magnet a it is advantageous to let it project beyond the end of the ma net to form a space b2 in which the attracte particles will collect.

In the modification shown in Figures 6 and 7, c is the length of Hat helical spring which we employ in place of the wire gauze in Figures 1 to 5, the said'spring c being designed to fit over and grip the end of the ma net a. The iron or steel particles from the o1l will collect between the turns of the spring c, which latter may be removed as desired for cleansing.

Figure 8 shows a spring retaining device or cage similar to that shown in Figures 6 and 7 but made of circular section wire.

Figures 9 and 10 also show a helical spring retaining device or cage but made from coiled wire e and retained in position by fixing screws e1, e1, the wire being coiled with such pitch as to collect fragments of metal broken from the teeth of wheels in gear-boxes and similar mechanisms.

. Claims:

1. The combination with a magnet .device for removing metallic particles from oil, of a removable collecting means surrounding portions of said magnet device to be immersed in the oil, and detachably secured thereto, and comprising a sleeve formed separately from the magnet device and providing spaces 4for retaining the metallic particles collected by the magnet, and removable from the magnet with the collected particles for cleaning, the removal of the collecting device efectively cleaning the enclosed portions of the magnet device.

2. The combination with a magnet device for removing metallic particles from oil, of a removable collecting means surrounding portions of said magnet device to be immersed in the oil, and detachably secured thereto, and comprising a strip of wire gauze coiled around the magnet and removable therefrom with the collected particles for cleaning, the

removal o said collecting means e'ectively 'cleaning the enclosed portions of the magnet device.

3. The combination with a magnet device for removing metallic particles from oil, of a removable collecting means surrounding portions of said magnet device to be immersed in the oil, and detachably .secured thereto, vand comprising a strip of wire auze of non-magnetic metal coiled around te said portions of the magnet device and removable therefrom with the collected metallic particles for cleaning, the removal of said collecting device effectively cleaning the enclosed portions of the magnet device.

4. The combination with a magnet device i for removing metallic particles from oil, of a 

